optimize ppusim with threads

1 files changed, 38 insertions, 0 deletions

diff --git a/src/ppusim/work.c b/src/ppusim/work.c
new file mode 100644
index 0000000..2073907
--- /dev/null
+++ b/src/ppusim/work.c
@@ -0,0 +1,38 @@
+#include <SDL2/SDL.h>
+#include <pthread.h>
+#include <stdio.h>
+
+#include "ppusim/work.h"
+#include "ppusim/sim.h"
+#include "ppu/consts.h"
+#include "ppusim/pixel.h"
+
+pthread_t g_hh_ppusim_scanline_threads[HH_PPU_SCREEN_HEIGHT];
+hh_s_ppusim_screen g_hh_ppusim_screen;
+
+void* hh_ppusim_draw_scanline(void* scanline_context) {
+	unsigned scanline = (unsigned long) scanline_context;
+	for (unsigned x = 0; x < HH_PPU_SCREEN_WIDTH; x++)
+		hh_ppusim_pixel(g_hh_ppusim_screen[scanline][x], x, scanline);
+	return NULL;
+}
+
+void hh_ppusim_draw_frame(SDL_Renderer* renderer) {
+	for (unsigned y = 0; y < HH_PPU_SCREEN_HEIGHT; y++)
+		pthread_create(&g_hh_ppusim_scanline_threads[y], NULL, hh_ppusim_draw_scanline, (void*)(unsigned long)y);
+	for (unsigned y = 0; y < HH_PPU_SCREEN_HEIGHT; y++)
+		pthread_join(g_hh_ppusim_scanline_threads[y], NULL);
+	
+	for (unsigned x = 0; x < HH_PPU_SCREEN_WIDTH; x++) {
+		for (unsigned y = 0; y < HH_PPU_SCREEN_HEIGHT; y++) {
+			SDL_SetRenderDrawColor(renderer, g_hh_ppusim_screen[y][x][0], g_hh_ppusim_screen[y][x][1], g_hh_ppusim_screen[y][x][2], 255);
+			SDL_RenderFillRect(renderer, &(SDL_Rect) {
+				.x = x * HH_PPUSIM_UPSCALE_FACTOR,
+				.y = y * HH_PPUSIM_UPSCALE_FACTOR,
+				.w = HH_PPUSIM_UPSCALE_FACTOR,
+				.h = HH_PPUSIM_UPSCALE_FACTOR,
+			});
+		}
+	}
+}
+